Grinding or sharpening device.



IATENTED JUNE 9,, 1903.

I. M. ROSE.

. GRINDING 0R SHARPENING DEVICE.

APPLICATION FILED MAR. 27. 1963.

NO MODEL.

co. worgmuoq WASHINGTON a c,

UNITED STATES Patented June i903.

'ATENT OFFICE.

ISRAEL M. ROSE, OF PHILADELPHIA, PENNSYLVANIA.

GRINDING OR SHARPENING. DEVICE.

SPECIFICATION forming part Of Letters Patent No. 730,706, dated June 9,1903.

Application filed March 27, 1903. Serial No. 149,844. (No model.)

To all whmn it may concern:

Be it known that I, ISRAEL M. ROSE, a citizen of the United States,residing in the city and county of Philadelphia, State of Pennsylvania,have invented new and useful Improvements in Grinding or SharpeningDevices, of which the following is a specification.

My invention consists of an improvementin a grinding and sharpeningdevice, the same embodying a stone or wheel, means for rotating saidwheel by the reciprocation thereagainst of the article to be sharpened,said article thus constituting the motor of said wheel, while ingrinding or sharpening contact with the same, a shaft carrying saidwheel, and means, a cross-bar which forms the bearings for said shaft,and a cap which incloses said parts and has said cross-bar connectedtherewith, whereby said shaft is firmly supported and is well enabled toendure the strain or pressure to which it is subjected when the deviceis in service.

It also consists of details of construction, as will be hereinafterdescribed.

Figure l represents a perspective view of a grinding, sharpening, orpolishing device embodying my invention. Fig. 2 represents a verticalsection thereof on line co m, Fig. 3. Fig. 3 represents a view of theinterior of the device,'taken from the bottom thereof. Fig. 4 representsa partial side elevation and a section of a portion at a right angle toFig. 2.

Similar letters of reference indicate corresponding parts in thefigures.

Referring to the drawings, A designates a cap having transverse slotsBin the crown or top thereof.

O designates a base on which said cap is secured. Within said cap is ahorizontallyarranged bridge or cross-bar D, whose ends are firmlysecured to said cap and whose central portion is formed with an eye E,in which is mounted the shaft F, said eye for the purpose of strengthbeing bent up from the metal or material of said cross-bar, as mostplainly shown in Fig. 4. On opposite portions of said shaft are theloosely-fitted stones, burs, runners, or wheels G of grinding andsharpening nature or of polishing nature, if so desired, theloosely-fitted disks H, of dishing or convex form, and the nuts J.Interposed between the bridge D and wheels G are the springs K, whosetendency is to hold said wheels in register with the slots 13 andcompensate for any irregularities of contiguous parts. Interposedbetween the disks H and the nuts Jare the springs L, whose tendency isto press said disks toward the wheels G, the tension of the same beingadjusted by the nuts J.

The operation is as follows: The blade of a knife or other article ofcutlery is passed through a slot B and introduced between the wheel anddisk below the same. The blade is now drawn to and fro, so thatreciprocating rotary motions are imparted to the wheel, and thus saidblade is subjected to a grinding and sharpening action, it being noticedthat when the blade first contacts with the disk the latter yieldslaterally to permit the proper location of the blade, after which theblade is pressed against the wheel, it being noticed that the blade byits reciprocations furnishes the power by which the wheel is rotated,and so the blade is ground and sharpened. During these operations thebearings of the shaft are subjected to considerable downward strain; butthe bridge D with its eye E are strong in their nature and so firmlysupport said shaft, while the bridge remains connected with the cap.

On the exterior of the cap at the lower portion thereof are the teats M,which when the said cap is pressed into the base 0 spring into saidbase, and so act as a lock for holding the cap reliably connected withthe base, it being evident that said cap is somewhat resilientin itsnature, and so first contracts in order to enter the base and thenexpands, causing the engagement of said teats with the inner wall ofsaid base, as most apparent in Fig. 2, without requiring otherfastenings for said cap in its mount upon said base.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In a grinding or sharpening device of the character stated, a wheel,a disk at the side of the same, a shaft on which said wheel and disk aremounted, an inclosing cap with a slot therein leading to the place ofgrinding or sharpening between said wheel and disk and a bridgeconnected with said cap and forming a bearing for said shaft.

2. In a grinding and sharpening device of the character stated, agrinding and sharpenipgwheel, a shaft for said wheel and a bridge whichis connected with a surrounding member and formed with an eye, in whichsaid shaft is mounted.

3. In a grinding or sharpening device, a base, grinding or sharpeningmembers mounted therein, a resilient cap inc losing said members andmounted on said base and having at top a slot leading to said membersand at bottom outwardly-projecting teats which are 15 sprung into saidbase.

4. In a grinding and sharpening device, a cap, a base on which the sameis supported, a grinding or sharpening member within said cap, a bridgesecured within said cap supporting the shaft of said member, and lookingmeans projecting from the exterior of said cap sprung into said base.

ISRAEL M. ROSE.

Witnesses:

JOHN A; VIEDERSHEIM, S. R. CARR.

